Four-cylinder drawhead



April 12, 1927. 1,624,815 i E. 'TQENNIESSEN FOUR-CYLINDER DRAWHEAD Jnvenfor Ernsf' TuennigZ Filed NQV. 17. 1925 7 Fig.2

Patented Apr. 12, 1927.

PATENT,

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FOUR-CYLINDER DRAWHEAD.

Application filed November 17, 1925, Serial No. 69,718, and in GermanyDecember 12', 1924. I

This invention relates to improvements in and relating to f0ur-cylinderdraw-heads for sequently it will also be possible to consider.

high draftwith special weighting of the top rollers situated in frontand behind the pair of drawing rollers. The invention essentiallycharacterizes itself in that, for the two top rollers, situated in frontand behind the pair of drawing rollers, a weightcontrolled saddle whichengages with a yoke, is journalled in such a manner, that in the open orraised position of said saddle, the front top roller stands under theentire weight, the two followingtop rollers being simultaneously laidfree.

The special weighting ,manner permits, in maintaining the weighting ofthe front top roller, which works together with the feed cylinder, tosimultaneously relieve the top roller situated behind the pair ofdrawing rollers, allowing thus, without interruption of service orbreaking of the thread, the easy access to the latter top roller andalso of the light drawing roller which may thus be comfortably cleaned.

The invention is clearly illustrated, by way of example, 011 theaccompanying drawing, in which: v

Fig. 1 is a schematic view ofthe draw head with weighting device, thesaddle being in the closed or lowered position. v

Fig. 2 is a similarview as Fig. 1, the

saddle being in the open or raised position.

The yoke .13 extends partly over and around the rollers of the drawframe and is held in a downward direction by a weight or spring G andengages with its forkshaped head into a pin 1 011 the nose 3 of thesaddle S journaled on thefront roller (1. The saddle is so mounted onthe roller that itis prevented from being disengaged therefrom whenswung forwardly to the position shown in 2. i In this manner the toprollers a and b are firmly pressed upon their corresponding bottomrollers I and III. Owing to the present weighted lever system, thediameter of the top roller 1) may be considerably reduced in oppositionto when own weighting is applied and conably reduce the distance of thepoint of contact between rollers II and c, and III and b, in oppositionto when own weighting is apphed- I This reliably acting weightingfurther attains':

(1) That between rollers III, I). and

IV, d an effective preliminary draft of what- 7 ever degree mayb'eapplied, and

(2) That the fibre tuft, projecting from rollers III, 6 in forwarddirection, is securely gripped and further morethan are held by rollers111,1). The pair of drawing rollers II, c guides the greatest part ofthe fibres still freely travelling about in the draft-field, so that,even at very high degrees of draft, uniform yarn is obtained.

of the entire fibres between the rollers II, 0 7

By swinging the saddle to the position In the opener raised position ofthe.

saddle shown in Fig. 2 the head of the yoke B butts against the saddleSand arrests and prevents further swinging ofthe saddle.

The lever may be weighted directly or indirectly without howeverdeparting from I l the scope of the invention.

I claim r p p 1. In combination with a four-cylinder drawhead, aweighting device comprising a weighted yoke extending over the front toppressure roller of the draw-head, and 'a saddle journaled on thefronttoproller and loosely connected with the-yoke'whereby the saddlecanbe swung into open position and with the said front top pressureroller remaining weighted. I

-2. In combination with a four-cylinder draw-head, a weighted yokeextending over vthe front top pressure roller of the drawhead and asaddle 'journaled on the top front roller, and means for pivotallyandcdetachably connecting the saddle withtheextreme end of the yoke,said end: serving a stop to limit'the outward swinging movement of thesaddle.

3. In combination with a four-cylinder draw-head a weighting devicecomprising a weighted yoke extending over the front top pressure rollerof the draw-head and provided with a forked shaped end, and a saddlejournaled on the front top pressure roller and provided with a pinengaged by the forked shaped end of the yoke.

4:. In combination with a four-cylinder draw-head, a weighting devicecomprising a yoke extending over the front top pressure roller of thedraw-head and provided with a forked head, and a saddle journaled on the10 front top rolier and provided. with a nose and a projection swung asa handle, and a ERNST TOENNIESSEN;

